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2bd0ea18 | 1 | /* |
5e656dbb | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
da23017d | 3 | * All Rights Reserved. |
2bd0ea18 | 4 | * |
da23017d NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
2bd0ea18 NS |
7 | * published by the Free Software Foundation. |
8 | * | |
da23017d NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
2bd0ea18 | 13 | * |
da23017d NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
2bd0ea18 NS |
17 | */ |
18 | ||
19 | #include <xfs.h> | |
20 | ||
5e656dbb BN |
21 | static const struct { |
22 | short offset; | |
23 | short type; /* 0 = integer | |
24 | * 1 = binary / string (no translation) | |
25 | */ | |
2bd0ea18 | 26 | } xfs_sb_info[] = { |
5e656dbb BN |
27 | { offsetof(xfs_sb_t, sb_magicnum), 0 }, |
28 | { offsetof(xfs_sb_t, sb_blocksize), 0 }, | |
29 | { offsetof(xfs_sb_t, sb_dblocks), 0 }, | |
30 | { offsetof(xfs_sb_t, sb_rblocks), 0 }, | |
31 | { offsetof(xfs_sb_t, sb_rextents), 0 }, | |
32 | { offsetof(xfs_sb_t, sb_uuid), 1 }, | |
33 | { offsetof(xfs_sb_t, sb_logstart), 0 }, | |
34 | { offsetof(xfs_sb_t, sb_rootino), 0 }, | |
35 | { offsetof(xfs_sb_t, sb_rbmino), 0 }, | |
36 | { offsetof(xfs_sb_t, sb_rsumino), 0 }, | |
37 | { offsetof(xfs_sb_t, sb_rextsize), 0 }, | |
38 | { offsetof(xfs_sb_t, sb_agblocks), 0 }, | |
39 | { offsetof(xfs_sb_t, sb_agcount), 0 }, | |
40 | { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, | |
41 | { offsetof(xfs_sb_t, sb_logblocks), 0 }, | |
2bd0ea18 | 42 | { offsetof(xfs_sb_t, sb_versionnum), 0 }, |
5e656dbb BN |
43 | { offsetof(xfs_sb_t, sb_sectsize), 0 }, |
44 | { offsetof(xfs_sb_t, sb_inodesize), 0 }, | |
45 | { offsetof(xfs_sb_t, sb_inopblock), 0 }, | |
46 | { offsetof(xfs_sb_t, sb_fname[0]), 1 }, | |
47 | { offsetof(xfs_sb_t, sb_blocklog), 0 }, | |
48 | { offsetof(xfs_sb_t, sb_sectlog), 0 }, | |
49 | { offsetof(xfs_sb_t, sb_inodelog), 0 }, | |
50 | { offsetof(xfs_sb_t, sb_inopblog), 0 }, | |
51 | { offsetof(xfs_sb_t, sb_agblklog), 0 }, | |
52 | { offsetof(xfs_sb_t, sb_rextslog), 0 }, | |
2bd0ea18 | 53 | { offsetof(xfs_sb_t, sb_inprogress), 0 }, |
5e656dbb BN |
54 | { offsetof(xfs_sb_t, sb_imax_pct), 0 }, |
55 | { offsetof(xfs_sb_t, sb_icount), 0 }, | |
56 | { offsetof(xfs_sb_t, sb_ifree), 0 }, | |
57 | { offsetof(xfs_sb_t, sb_fdblocks), 0 }, | |
58 | { offsetof(xfs_sb_t, sb_frextents), 0 }, | |
59 | { offsetof(xfs_sb_t, sb_uquotino), 0 }, | |
60 | { offsetof(xfs_sb_t, sb_gquotino), 0 }, | |
61 | { offsetof(xfs_sb_t, sb_qflags), 0 }, | |
62 | { offsetof(xfs_sb_t, sb_flags), 0 }, | |
63 | { offsetof(xfs_sb_t, sb_shared_vn), 0 }, | |
2bd0ea18 | 64 | { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, |
5000d01d SL |
65 | { offsetof(xfs_sb_t, sb_unit), 0 }, |
66 | { offsetof(xfs_sb_t, sb_width), 0 }, | |
67 | { offsetof(xfs_sb_t, sb_dirblklog), 0 }, | |
9440d84d NS |
68 | { offsetof(xfs_sb_t, sb_logsectlog), 0 }, |
69 | { offsetof(xfs_sb_t, sb_logsectsize),0 }, | |
5000d01d | 70 | { offsetof(xfs_sb_t, sb_logsunit), 0 }, |
2999b9c1 | 71 | { offsetof(xfs_sb_t, sb_features2), 0 }, |
45935737 | 72 | { offsetof(xfs_sb_t, sb_bad_features2), 0 }, |
5000d01d | 73 | { sizeof(xfs_sb_t), 0 } |
2bd0ea18 NS |
74 | }; |
75 | ||
56b2de80 DC |
76 | /* |
77 | * Reference counting access wrappers to the perag structures. | |
78 | * Because we never free per-ag structures, the only thing we | |
79 | * have to protect against changes is the tree structure itself. | |
80 | */ | |
81 | struct xfs_perag * | |
82 | xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno) | |
a33a9e62 | 83 | { |
56b2de80 DC |
84 | struct xfs_perag *pag; |
85 | int ref = 0; | |
86 | ||
87 | rcu_read_lock(); | |
88 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
89 | if (pag) { | |
90 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
91 | ref = atomic_inc_return(&pag->pag_ref); | |
a33a9e62 | 92 | } |
56b2de80 DC |
93 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); |
94 | rcu_read_unlock(); | |
95 | return pag; | |
96 | } | |
a33a9e62 | 97 | |
56b2de80 DC |
98 | void |
99 | xfs_perag_put(struct xfs_perag *pag) | |
100 | { | |
101 | int ref; | |
a33a9e62 | 102 | |
56b2de80 DC |
103 | ASSERT(atomic_read(&pag->pag_ref) > 0); |
104 | ref = atomic_dec_return(&pag->pag_ref); | |
105 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
a33a9e62 | 106 | } |
cdded3d8 | 107 | |
5e656dbb BN |
108 | void |
109 | xfs_sb_from_disk( | |
110 | xfs_sb_t *to, | |
111 | xfs_dsb_t *from) | |
112 | { | |
113 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
114 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
115 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
116 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
117 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
118 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
119 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
120 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
121 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
122 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
123 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
124 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
125 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
126 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
127 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
128 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
129 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
130 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
131 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
132 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
133 | to->sb_blocklog = from->sb_blocklog; | |
134 | to->sb_sectlog = from->sb_sectlog; | |
135 | to->sb_inodelog = from->sb_inodelog; | |
136 | to->sb_inopblog = from->sb_inopblog; | |
137 | to->sb_agblklog = from->sb_agblklog; | |
138 | to->sb_rextslog = from->sb_rextslog; | |
139 | to->sb_inprogress = from->sb_inprogress; | |
140 | to->sb_imax_pct = from->sb_imax_pct; | |
141 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
142 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
143 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
144 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
145 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
146 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
147 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
148 | to->sb_flags = from->sb_flags; | |
149 | to->sb_shared_vn = from->sb_shared_vn; | |
150 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
151 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
152 | to->sb_width = be32_to_cpu(from->sb_width); | |
153 | to->sb_dirblklog = from->sb_dirblklog; | |
154 | to->sb_logsectlog = from->sb_logsectlog; | |
155 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
156 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
157 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
158 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
159 | } | |
160 | ||
161 | /* | |
162 | * Copy in core superblock to ondisk one. | |
163 | * | |
164 | * The fields argument is mask of superblock fields to copy. | |
165 | */ | |
166 | void | |
167 | xfs_sb_to_disk( | |
168 | xfs_dsb_t *to, | |
169 | xfs_sb_t *from, | |
170 | __int64_t fields) | |
171 | { | |
172 | xfs_caddr_t to_ptr = (xfs_caddr_t)to; | |
173 | xfs_caddr_t from_ptr = (xfs_caddr_t)from; | |
174 | xfs_sb_field_t f; | |
175 | int first; | |
176 | int size; | |
177 | ||
178 | ASSERT(fields); | |
179 | if (!fields) | |
180 | return; | |
181 | ||
182 | while (fields) { | |
183 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
184 | first = xfs_sb_info[f].offset; | |
185 | size = xfs_sb_info[f + 1].offset - first; | |
186 | ||
187 | ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); | |
188 | ||
189 | if (size == 1 || xfs_sb_info[f].type == 1) { | |
190 | memcpy(to_ptr + first, from_ptr + first, size); | |
191 | } else { | |
192 | switch (size) { | |
193 | case 2: | |
194 | *(__be16 *)(to_ptr + first) = | |
195 | cpu_to_be16(*(__u16 *)(from_ptr + first)); | |
196 | break; | |
197 | case 4: | |
198 | *(__be32 *)(to_ptr + first) = | |
199 | cpu_to_be32(*(__u32 *)(from_ptr + first)); | |
200 | break; | |
201 | case 8: | |
202 | *(__be64 *)(to_ptr + first) = | |
203 | cpu_to_be64(*(__u64 *)(from_ptr + first)); | |
204 | break; | |
205 | default: | |
206 | ASSERT(0); | |
207 | } | |
208 | } | |
209 | ||
210 | fields &= ~(1LL << f); | |
211 | } | |
212 | } | |
213 | ||
214 | /* | |
215 | * xfs_mount_common | |
216 | * | |
217 | * Mount initialization code establishing various mount | |
218 | * fields from the superblock associated with the given | |
219 | * mount structure | |
220 | * | |
221 | * Note: this requires user-space public scope for libxfs_mount | |
222 | */ | |
223 | void | |
224 | xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) | |
225 | { | |
5e656dbb BN |
226 | mp->m_agfrotor = mp->m_agirotor = 0; |
227 | spin_lock_init(&mp->m_agirotor_lock); | |
228 | mp->m_maxagi = mp->m_sb.sb_agcount; | |
229 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
230 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
231 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
232 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
233 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
5e656dbb BN |
234 | mp->m_blockmask = sbp->sb_blocksize - 1; |
235 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
236 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
5e656dbb | 237 | |
b3563c19 BN |
238 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); |
239 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
240 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
241 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
242 | ||
243 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
244 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
245 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
246 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
247 | ||
248 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
249 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
250 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
251 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
5e656dbb BN |
252 | |
253 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); | |
254 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, | |
255 | sbp->sb_inopblock); | |
256 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
257 | } | |
258 | ||
cdded3d8 DC |
259 | /* |
260 | * xfs_initialize_perag_data | |
261 | * | |
262 | * Read in each per-ag structure so we can count up the number of | |
263 | * allocated inodes, free inodes and used filesystem blocks as this | |
264 | * information is no longer persistent in the superblock. Once we have | |
265 | * this information, write it into the in-core superblock structure. | |
5e656dbb BN |
266 | * |
267 | * Note: this requires user-space public scope for libxfs_mount | |
cdded3d8 | 268 | */ |
5e656dbb | 269 | int |
cdded3d8 DC |
270 | xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount) |
271 | { | |
272 | xfs_agnumber_t index; | |
273 | xfs_perag_t *pag; | |
274 | xfs_sb_t *sbp = &mp->m_sb; | |
5e656dbb BN |
275 | uint64_t ifree = 0; |
276 | uint64_t ialloc = 0; | |
277 | uint64_t bfree = 0; | |
278 | uint64_t bfreelst = 0; | |
279 | uint64_t btree = 0; | |
cdded3d8 | 280 | int error; |
cdded3d8 DC |
281 | |
282 | for (index = 0; index < agcount; index++) { | |
283 | /* | |
284 | * read the agf, then the agi. This gets us | |
56b2de80 | 285 | * all the information we need and populates the |
cdded3d8 DC |
286 | * per-ag structures for us. |
287 | */ | |
288 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
289 | if (error) | |
290 | return error; | |
291 | ||
292 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
293 | if (error) | |
294 | return error; | |
56b2de80 | 295 | pag = xfs_perag_get(mp, index); |
cdded3d8 DC |
296 | ifree += pag->pagi_freecount; |
297 | ialloc += pag->pagi_count; | |
298 | bfree += pag->pagf_freeblks; | |
299 | bfreelst += pag->pagf_flcount; | |
300 | btree += pag->pagf_btreeblks; | |
56b2de80 | 301 | xfs_perag_put(pag); |
cdded3d8 DC |
302 | } |
303 | /* | |
304 | * Overwrite incore superblock counters with just-read data | |
305 | */ | |
5e656dbb | 306 | spin_lock(&mp->m_sb_lock); |
cdded3d8 DC |
307 | sbp->sb_ifree = ifree; |
308 | sbp->sb_icount = ialloc; | |
309 | sbp->sb_fdblocks = bfree + bfreelst + btree; | |
5e656dbb BN |
310 | spin_unlock(&mp->m_sb_lock); |
311 | ||
312 | /* Fixup the per-cpu counters as well. */ | |
313 | xfs_icsb_reinit_counters(mp); | |
314 | ||
cdded3d8 DC |
315 | return 0; |
316 | } | |
5e656dbb BN |
317 | |
318 | /* | |
319 | * xfs_mod_sb() can be used to copy arbitrary changes to the | |
320 | * in-core superblock into the superblock buffer to be logged. | |
321 | * It does not provide the higher level of locking that is | |
322 | * needed to protect the in-core superblock from concurrent | |
323 | * access. | |
324 | */ | |
325 | void | |
326 | xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) | |
327 | { | |
328 | xfs_buf_t *bp; | |
329 | int first; | |
330 | int last; | |
331 | xfs_mount_t *mp; | |
332 | xfs_sb_field_t f; | |
333 | ||
334 | ASSERT(fields); | |
335 | if (!fields) | |
336 | return; | |
337 | mp = tp->t_mountp; | |
338 | bp = xfs_trans_getsb(tp, mp, 0); | |
339 | first = sizeof(xfs_sb_t); | |
340 | last = 0; | |
341 | ||
342 | /* translate/copy */ | |
5e656dbb BN |
343 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields); |
344 | ||
345 | /* find modified range */ | |
56b2de80 DC |
346 | f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); |
347 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
348 | last = xfs_sb_info[f + 1].offset - 1; | |
5e656dbb BN |
349 | |
350 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
351 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
352 | first = xfs_sb_info[f].offset; | |
353 | ||
5e656dbb BN |
354 | xfs_trans_log_buf(tp, bp, first, last); |
355 | } |